[3] | 1 | ; $Id: strcpy.asm 98103 2023-01-17 14:15:46Z vboxsync $
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| 2 | ;; @file
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[14021] | 3 | ; IPRT - No-CRT strcpy - AMD64 & X86.
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[3] | 4 | ;
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| 5 |
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| 6 | ;
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[98103] | 7 | ; Copyright (C) 2006-2023 Oracle and/or its affiliates.
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[5999] | 8 | ;
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[96407] | 9 | ; This file is part of VirtualBox base platform packages, as
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| 10 | ; available from https://www.virtualbox.org.
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[5999] | 11 | ;
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[96407] | 12 | ; This program is free software; you can redistribute it and/or
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| 13 | ; modify it under the terms of the GNU General Public License
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| 14 | ; as published by the Free Software Foundation, in version 3 of the
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| 15 | ; License.
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| 16 | ;
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| 17 | ; This program is distributed in the hope that it will be useful, but
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| 18 | ; WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | ; General Public License for more details.
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| 21 | ;
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| 22 | ; You should have received a copy of the GNU General Public License
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| 23 | ; along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | ;
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[5999] | 25 | ; The contents of this file may alternatively be used under the terms
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| 26 | ; of the Common Development and Distribution License Version 1.0
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[96407] | 27 | ; (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
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| 28 | ; in the VirtualBox distribution, in which case the provisions of the
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[5999] | 29 | ; CDDL are applicable instead of those of the GPL.
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| 30 | ;
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| 31 | ; You may elect to license modified versions of this file under the
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| 32 | ; terms and conditions of either the GPL or the CDDL or both.
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| 33 | ;
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[96407] | 34 | ; SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
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| 35 | ;
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[3] | 36 |
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| 37 | %include "iprt/asmdefs.mac"
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| 38 |
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[1174] | 39 | BEGINCODE
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| 40 |
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[3] | 41 | ;;
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[75129] | 42 | ; @param pszDst gcc: rdi msc: rcx x86:[esp+4] wcall:eax
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| 43 | ; @param pszSrc gcc: rsi msc: rdx x86:[esp+8] wcall:edx
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[14021] | 44 | RT_NOCRT_BEGINPROC strcpy
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[1174] | 45 | ; input
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[3672] | 46 | %ifdef RT_ARCH_AMD64
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[3] | 47 | %ifdef ASM_CALL64_MSC
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[14024] | 48 | %define pszDst rcx
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| 49 | %define pszSrc rdx
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[3] | 50 | %else
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[14024] | 51 | %define pszDst rdi
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| 52 | %define pszSrc rsi
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[3] | 53 | %endif
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[14024] | 54 | mov r8, pszDst
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[3] | 55 | %else
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[75129] | 56 | %ifdef ASM_CALL32_WATCOM
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| 57 | mov ecx, eax
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| 58 | %else
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[1174] | 59 | mov ecx, [esp + 4]
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| 60 | mov edx, [esp + 8]
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[75129] | 61 | %endif
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| 62 | %define pszDst ecx
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| 63 | %define pszSrc edx
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[14024] | 64 | push pszDst
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[3] | 65 | %endif
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| 66 |
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[1174] | 67 | ;
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| 68 | ; The loop.
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| 69 | ;
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| 70 | .next:
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[14024] | 71 | mov al, [pszSrc]
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| 72 | mov [pszDst], al
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[1174] | 73 | test al, al
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[14021] | 74 | jz .done
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[3] | 75 |
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[14024] | 76 | mov al, [pszSrc + 1]
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| 77 | mov [pszDst + 1], al
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[1174] | 78 | test al, al
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[14021] | 79 | jz .done
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[1174] | 80 |
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[14024] | 81 | mov al, [pszSrc + 2]
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| 82 | mov [pszDst + 2], al
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[1174] | 83 | test al, al
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[14021] | 84 | jz .done
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[1174] | 85 |
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[14024] | 86 | mov al, [pszSrc + 3]
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| 87 | mov [pszDst + 3], al
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[1174] | 88 | test al, al
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[14021] | 89 | jz .done
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[1174] | 90 |
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[14024] | 91 | add pszDst, 4
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| 92 | add pszSrc, 4
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[1174] | 93 | jmp .next
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| 94 |
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[14021] | 95 | .done:
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| 96 | %ifdef RT_ARCH_AMD64
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| 97 | mov rax, r8
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| 98 | %else
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| 99 | pop eax
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| 100 | %endif
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[3] | 101 | ret
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[14021] | 102 | ENDPROC RT_NOCRT(strcpy)
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[3] | 103 |
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